Adding-machine.



. 'PATENTED MAY 5, 1908. G.ROTH.

ADDING MACHINE.

APPLIOAI'ION FILED JUNE 8. 1906.

No. 886,543. PATENTED MAY 5, 1908. G. ROTH.

ADDING MACHINE.

APPLIOAT-ION FILED mm a; 1906.

3 BKEETB-BKIIBT 2.

witness es.

No. 886,543. PATENTED MAY 5,.1908,

G. ROTH.

' AD-DING MACHINE.

' APPLIUATION FILED, JUNE 8, 1906 FlCz-e 19 L wzlness es 1 3 SHEETS-SHEET 3.

UNITED sTAtr ss PATENTOFFICE.

GEORG ROTH, OF ZURICH, SWITZERLAND, ASSIGNOR TO AKTIEN GESELLSGHAFT Fll'R TECHNISPHE INDUSTRIE, OF ZURICH, SWITZERLAND, A CORPORATION.

ADDING-MACHINE.

Specification of Letters Patent,

Patented. May 6, 1908.

Application filed IuneB, 1906. Serial No. 320,764.

To all whom it may concern:

Be it known that I, Gnone Born, a citizen of the Swiss Republic, residing at Zurich, in

- gearing with. the operatin common drivm means, sald mechamsm be-' Switzerland, have invented .certain new and useful Im rovements in Adding-Machines,

- of which't e following is aspecific'ation.

" This invention relates to improvements in adding machines and comprises improved mechanism for the transmission-of the keymovements to thel adding wheels, by direct wheels through ing adapted to e looked should'the keys be dicate corresponding parts throughout the.

several views.

, On a shaft 17 having bearings'in the machine-frame 18 are rotatably mounted'the key-levers 1 to 9 and alever 19 rovided with across bar 44.1; The lever 19 in Fig. 2

\ comes behind the key-lever 1 for the greater and the cross bar 44,

part of its length, shown in section, projects from the lower edge of the lever 19 and extends crosswise under the key-levers". The toothed end,

portion 10 of the leve'r 19 projects beyond the lever 1 at the end farthdst from the shaft 17 and the relation of the end portions of the two levers is more clearly shown in Fig. 6. Each of said levers bears near itscenterof -motion on a helical spring 20 and said 'tra smounted loose y on said shaft13 so that said.

driving wheel. 14' iii-revolved by the rotation versejbar-44 serves lisa support for the ke. levers. "By means of sai is limited 1) 1 an abutment 25. The front end. 0 the lever 19 is formed as atoothed segmentlO adapted to-m'eshwith a toothed wheel '11 mounted onthe shaft 13,

also carrying a ratchet wheel 12 engaged by a pawl 22 ivoted to adrivirig' wheel 14 of the shaft '13 on depressing a key, whereas 1 2 isa longi springs '20, t e. lever 19 and the key-levers 1 to 9 are nor; maliy. held in their upper initial positio it remains free on movement in the opposite direction.v

The keys 1 to 9 carrying tne corresponding numerals orsymbols are each provided-at their free end with a downwardly extending nose 28 that on each key being of a differentfiO length, proportionally to the value of the figures 1 to 9. Below the noses 23 is pivotally mounted at 78 in the machine frame a bow or frame 24 having an arm 26 extending beyond the center of rotation said bow having a tooth 26" at its free end and being so Weighted that the transverse portion 27 at the opposite end of the bow is normally held 7 in its upper position.

On a stationary shaft 16 parallel to the aforesaid shaft 13 a plurality 'of toothed-. wheel couples 15, 77, are loosely mounted each having ten teeth and connected in couples, the first toothed wheel lying on the right or behind the first couple being engaged by the driving wheel 14. Meshing with the Wheels 77 of said toothed. couples are'the toothed wheels 67 each connected rigidly with a number disk 59 and disk 68.

(See Figs.'2 and 4.) The said wheels 67 are mounted on a shaft 58 and-also each have ten teeth. The disk 68i's; provided with a tooth 69, and, adjacent the latter, with a lateral recess 7 0. With the exception. of the first toothed-wheel oou le each of the latter '85 1 is providedwith a rate et wheel 37 enga ed by atoothed lever 38 insu'ciia manner t at the latter liesibetween' the disk 68 and said ratchet wheel" (See Fig. 2.) The said lever 38 is rotatably' mounted on-fa shaft 40and is. pressed on to the ratchet wheel 37 by a spring 39." The shaft 58 carrying the number disks 59 has hearings in a separate casing 21 adapted. to have sliding movement in the machine fra'me 18 by means of a guide rod 56. Y In said casing 21 isalso mounted a rotatableshaft 55on which are fixed hooked levers64 and fiat-springs 65resting at their 7 I free ends on the toothed wheels 67 that is to 1 say on one tooththereof.) (See Figs. 2 and '5.) ,,-'The shaft 55 also carries a toothed catch 62 ada tedto engage a recess '61 in a disk 60 secure on the shaft 58, said catch being under the influence of a helical tension spring 54. In place of the s rings 65. spring-actuated leversmay be use Thenumber of disks 59 and toothed wheel Y couples 15 may be optional and is chosen inspection apertures 57 and recesses 76 are number of rows of figures provided in the 'casing 21, the\said recesses eing adapted to be engaged by pins or pointers 71 on the machine-frame 18 and also by a propeller 72 arranged on said frame. The said propeller 72 consists of a plate revolubly mounted on a stationary pin or pivot 74, and having two inclined blades or projections 73 arranged at angles with regard to each other. a The working surface of said projections is segment shaped; the axis of the segment lying in the center of rotation of the propeller. I I

The projections 73 engage the recesses 76 in such a manner that by the rotation of the propeller in the direction indicated by the arrow in Fig. 3 the casing 21 is raised that is rotated towards the rear and again lowered, the aforesaid guide-rod 56 forming the fulcrum.

As the projections 73 are at angles to each 1 other, the casing 21 is shifted at each half rotation, for a distance. corresponding to that.

between two recesses 76 the following projection coming into engagement with the next recess, whereas at the same time the pins 71 come into engagement with the next ollowing recess.

It is obvious that the propeller may have only a single or more than two projections 73.

The above described displacement of the casing 21 that is of the adding wheel gearing withregard to the toothed wheel couples 15, 77, takes place to the right as often as a row of figures is to be added viz. as often as more than one unit exists in one of the numbers to be added. At the commencement of the addition the casing 21 is suitably engaged by its first recess on the right so that the first pin 71 formed as a pointer is directed towards the inspection a erture. I

The number disks 59 are provided at their peripheries with the figures 09 and in order to bring same into the zero-position, that is into such a position that in each inspection aperture 57 the figure 0 appears, the number-disk shaft 58 extends through the end wall of the casing 21 and is provided exteriorly with a knob 66. If this knob 66 is rotated in the direction indicated by the arrow in Fig. 3 the lever 62 becomes disengaged from the recess 61 in the .disk 60 and slides upon .the normal peri hery thereof of the same (Fig. 5). The sliaft is thus rotated and the locking s rings 65 are consequently raised so that t 1e toothed wheels 67 are released, and the hooked-levers 64 project into the ath of abutment pins 63 projecting laterally from the number wheels at suitable oints. By the rotation of the shaft 58 and disk the number wheels 59, toothedwheels 67 and single toothed disks 68 are revolved by frictional contact with the said disk 60, until their abutment pins 63 engage the corresponding hooked-levers 64 whereupon said number wheels are locked. The rotation of the shaft 58 and disk 60 is continued until the lever 62 again engages the recess 61 in the disk 60 that is to say until a complete revolution has been erformed, during which all the number wheel; reach the zero-position in a shorter or longer time. On the engagement of the lever 62 into the recess 61 the hooked lever 64 is returned to the position of rest and the locking springs 65 into their operative position.

When a key is depressed the lever. 19 and toothed segment 10 are consequently moved downwards until nose 23 on said key-lever strikes against the transverse portion 27 of the bow 24 whereby this part of the bow is depressed and the tooth-26 moved upwardsinto engagement with the teeth of the driving Wheel 14 which is thereby locked.

The driving wheel is revolved through a longer or shorter distance by the toothed segment 10 according to the length of the noses 23 this distance corresponding to the propor- I tion or value of the fi ures so that if, for instance the key 3 e depressed the first wheel 15 of the toothed wheel couple is rotated through three teeth and if the key 7 is depressed through seven teeth.

At the commencement of the addition the toothed wheel 67 of the first right hand number wheel meshes with the second toothed wheel 77 of the first couple so that if keys 3 and 7 be depressed the figures 3 and 0 appear after each other in the first inspection aperture. After a complete revolution of the number wheels has been performed, the tooth 69 engages the first toothed wheel 15 of the second couple so that the latter is rotated throu 11 one tooth. The second wheel 77 of t iis couple meshes with the toothed wheel 67 of the second number disk thus causing the figure 1 to ap ear in the inspection aperture belonging tiiereto (to the left of that first mentioned) so that in the two apertures the sum 10 of 3+7 is indicated.

When during the progress of the addition the second number wheel is rotated through ten units or teeth the corresponding tooth 69 acts on the toothed wheel 15 of the third cou le the second wheel 77 of which meshes wit the third number wheel and rotates the same through the corresponding number of units. 1

When one row of fi ures has been dealt with, the casing 21 is is laced to the right by a half-revolution of t e propeller 72 so that the second number wheel comes into engagement with the first toothed wheel couple and the first number wheel is put. out

of action. The adding wheels arelocked'in the corresponding position bynieans of the levers 38. Whenhowever the toothed wheel couple and therefore the ratchet-wheel. 37 are rotated by the tooth 69 the lever 38 mayv pass, against the action of its sprin 39, into the recess 70 in the single toothe disk 68 which recess passes at this moment, until said lever 38 again engages the next tooth of the ratchet wheel 37.

In order to control the machine when the keys are struck negligently and to avoid recommencing the addition an angle-lever 45, 46 is mounted in a shaft 43, the arm 46 of said lever being provided with teeth 46 and carrying an abutment 48, Figs. 6 and 7, the latter having a recess 80 for passage of the segment lever 19. j

Owing to the wei ht'of the arm 46 being greater than that o the arm v45, the latter normally lies with its u per inclined end against the'cross bar 44 o the segment lever 19. The noses 23 of the key-levers 1 to-9 are each provided with a stud 41 adapted to engage the hooked end of the abutment 48.

v The segment-lever 19' is provided with a spring catch 471 ing in the path of the an lelever 45., 46; T 1e arm is rovided wit a pivoted catch 49 movable onFy in an upward direction and engaging a toothed lever 51, the latter bein mounted on a shaft 42 suported in the rame 18 and connectedby a ink to a slotted arm 52 of the bow 24, the

lattertherefore holding the catch 51 in position;

When a key is depressed the cross bar 44 force s. backwardsthe arm 45 so that, as shown in Fig. 6, the catch 49 engagesthe toothed lever 51 and the catch 47 the teeth 46. of the arm 46. At the same time the abutment 48 is moved beneath the studs 41- of the other key-lever-noses 23 whereas the stud-of the operated key lever is already below thepoint of action-of the abutment 48] Should the respective key be released before its nose 23 has struck the transverse portion 27, of the bow 24 the stud 41 .cn this key I strikes from below against the abutment 48 and prevents the key from completely returning to its initial position andat thesame 'theconsequent locking of the key-levers it is a p p p j at its other end with a toothedsegment and time the segment-lever) is prevented'from', returning'by the en agement of its catch .47 with theteeth '46 o the arm 46. Owing to impossible to depress any other lever than that one the stud 41 of which is below the.

' lane than the remainder,

key struck did not correspond to the value desined, the difference can be bo'rne'in mind ,65

, take can be corrected bi; com e loc ing the key lever and t be put out of action withoutdan er of. transa ferring a unit too many or too ew. If the.

at the next key-stroke since the value of the key previously depressed can beascertained by means of the locking device. 1

When the key is com letely depressed the nose 23 thereof strikes t e transverse part 27 of the bow 24 so that the latter is-rocked. about its pivotal point 78 and itstooth 26 caused to engage the teeth of the driving wheel 14 and lockthe same, whereas the arm 52 link 50 and'the toothed lever 51 are moved downwards so that the catch 49. is disengaged fromthe toothed lever 51 and the arm 45 of the angle-lever 45, 46moves'back'whereupon the catch 47 is disengaged-from the abutment 48 and all the parts are permitted to return to their original positions. For stopping the driving wheel 14 an angle lever 30, 34 pivoted at 33 is provided. The arm 30 of said lever has rotatably'secured thereto a shoe'29 and the arm 34 under the action of a.

spring 31 in such a manner that the shoe 29 is pressed against the periphery 7 9 of the driving wheel 14 the shoe 29 is preferably provided with a sole orsurface 32 of caoutchouc or similar material. a

The. machine is provided with a casin'g25 curved at its front part to form asupportforthe hand.

What I claim as'my inventionand desire to secure by Letters Patent of the-United;

States is with a stationary frame, of a series .of fingerkey levers pivoted in the said frame and r'ovided with projections which limit t eir.

, downward movement in a prearranged proportion, a lever also pivoted in'the said "frame and provided with a toothed segment and having a bar with which the said finger-key levers engage, a toothed transferring wheel I .wheel and to limit the downward movement of the said levers simultaneously.

2.- In an adding machine, the combination, l

'- with a series of pivoted finger'key -levers provided with stops which limit their downward movement'ina prearranged proportion, of a s' le lever pivoted at one end and provided having a bar at its" middle part which extends I crosswise undert'he' said key-levers, atoothed wheel'eh a 'ng with the said segment, a pivoted. ang e jeiger operated by the said lever when'moved downward, said 'angle lever bejirlil gfirovided withffa stop which p'revents. all It the saidlever from being depressed accideneysfwhich have notbeen depressed with tally, and registering mechanism-operated by T'the said-wheel.

3. In an adding "machine, the combination,

, witha seriesof'pivdted finger key-levers pro- 1. In an adding machlne, the combinatlon,

vided with stops which limit tiiii downward movement in a prearranged proportion, of'a single lever pivoted at one end'and provided at its other end with a toothed segment and having a bar at its middle part which extends crosswise underthe said ke -levers, a toothed wheel engaging with the said segment, ,a locking device operated by each of the said keylevers and engaging with the said wheel, a

pivoted angle-lever operated by the said levet when moved-downward 'pur osely by an one key-lever, said angle-lever eing providbd with a stop which then prevents the accidental downward movement of the remaining key-levers, catch mechanism con secured together in couples, each said couple 1 being journaled on the said shaft 16; of driving mechanism for revolving one of the said -wheels 15 step by step, a shaft 58,

toothed wheels 67 mounted on the shaft 58 and engagin with the said toothed wheels 77, number 'sks secured to the said wheels 67, disks 68 each having a single tooth, said disksbeing also securedto the said wheels 67 and operating the wheels 15. of the. nextadjacent couples .once during each revolution of the said wheels 67 to which they are se- -cured,.and means for locking and releasing the said toothed wheels.

5. In an adding machine, the combination, with a shaft16, and toothed wheels 15 and 77 secured'together in couples, each said cou le being journaled'on the said shaft 16; of rising mechanism for revolving one of the said wheels 15 step by ste ,a shaft 58, a casing sup ortin the said s aft 58 independent of-t e said shaft '16 and its saidwheels, a revoluble propeller for moving the said casingstep bystep lon tudinally of the said shaft 16, toothed wheel the shaft 58 and engaging with the said s 67 mounted on toothed wheel'sf77, number disks secured to the 'said wheels 67, disks 68 each having a single tooth, said disks .being also secured to the said wheels 167 and operating the wheels 15 of the next ad'acent couples'once during each revolution 0 the said wheels 67 are secured, and means for locking and re easing the said toothed wheels. 6. In an adding machine 'thecombination with a series -of keys noses of different lengths at the free ends of said keys, a spring supsaid lever through distances co'rres mon drivm taimng 'sai ported lever o erated by said keys,- a common driving w eel adapted to be rotated by the value of the eye operated de ermi e the length of said noses, a pivoted bow adapted to be en aged by said noses to lock h drivin wheev and limit the movement of pondincg to the keys din Wheels actuated by said driv- 7 ing. wheel, an means'for locking the spn'n sulpported lever on incomplete depression 0 a ey comprising an angle lever and catches adapted to lock said ang e lever to the spring supported lever and bow aforesaid substant'a y as described.- 1

7. In an adding machine the combination with a series of keys noses of different lengths 'at the free ends of 'said'keys, aspring. supported lever 0 'rated by said keys, a conimon driving w eel adapted to be rotated. by said lever, throughdistances c'orrespondi to the value of the keys operated determine .by the lengthof said noses, a pivoted bow,

adaptedto be engaged bysaid noses to lock the driving wheel and limit the movement of the keys, adding wheels actuated'by' said driving wheel, means fpr locking the spring supported lever on incomplete epression of a ey comprising an an le lever and catches adapted to lock saidang e lever to the s ring supported lever an'dbow'aforesaid, a sli able casing containing the adding wheels aforesaid and having-recesses along an edge thereof and means for laterally displacing said casing and adding wheels comprising a rotatable propellerhaving inclined projections adapted to engage the aforesaid recesses substantially as described. I

' 8. In an-adding machine the combination with a series of keys of aspring sup orted lever co-actin therewith, a common (iiiving wheel adapte to be rotated by said lever through distances corresponding to the value of the keys 0' rated, mean'sfor locking said driving whee after each. operation of the keys' 'means'for locking the aforesaid sprin su ported lever on incomplete. de ession'o a e adding wheels, 1nterme 'ate gear 'whee s between the adding "wheels, and comwheel, a shdable casing conadding wheels, means for laterally, displacing said cas' and addin wheels and means for suitab ylocking an releasing said adding wheels and. interme-v GEORG ROTH.

Witnesses:

A. LIEBERKNEGHT,

F. IsLER. 

